function loadPage(url) {
	$("#center_content_").html('<center><div class="alert alert-info" role="alert"><a href="#" class="alert-link"><i class="fa fa-spinner fa-spin"></i>加载中...</a></div></center>');
	$("#center_content_").load(url, null, function(r, s, x) {
		if (s == 'error') {
			$("#center_content_").html(r);
		}
	});
}
